Technical Library

Error Sources: Probe/Target Angle

Capacitive Sensor TechNote LT03-0010

Summary

This TechNote describes the extent and nature of measurement errors as a result of a capacitive probe’s sensing surface not being parallel to the target surface.

Error Sources: Capacitive Probe/Target Angle

Nature of the Error:

Systems are calibrated with the probe perpendicular to the target surface. As that angle changes, the output will show a DC (offset) shift relative to the actual gap from the probe’s center axis to the target.